Definitely worth doing!
I installed a technoTorque in my '99 2.5L and it was definitely a worthwhile mod. Nothing but butt-dyno results, however, I could certainly feel the difference - especially lower end once DME learned the new airflow (about 30-40miles).
In full disclosure, I have no reason to make myself feel good for saying it improved the car b/c I won mine as a door prize from BRBS LY. I planned to clean my TB anyhow so even the labor I put in was accounted for. Total install time including a good TB cleaning would be 1.5hrs taking your time.
Go for it, you'll be pleased
